Consider this situation: 1.)I like chocolate icecream. 2.)My sister dislikes chocolate icecream, but prefers vanilla icecream. I was wondering, why do people dislike or like something? Does one person get a stronger synaptic charge of seratonin (I hope that's the right neurotransmitter; if it isn't, I'm refering to one of or the one that deals with pleasure sensations. ) while the other person gets a lower charge? I am relating this to how addictions are contracted neurologically(such as those to drugs).